YhfX family PLP-dependent enzyme similar to Escherichia coli pyridoxal 5'-phosphate (PLP)-dependent protein YhfX, which is a predicted amino acid racemase involved in amino acid transport and metabolism
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme yhfX; This subfamily is composed of the ...
1-382
0e+00
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme yhfX; This subfamily is composed of the uncharacterized protein yhfX from Escherichia coli K-12 and similar bacterial proteins. These proteins are homologous to bacterial alanine racemases (AR), which are fold type III PLP-dependent enzymes containing an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. AR exists as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. It catalyzes the interconversion between L- and D-alanine, which is an essential component of the peptidoglycan layer of bacterial cell walls. Members of this subfamily may act as PLP-dependent enzymes.
:
Pssm-ID: 143486 Cd Length: 382 Bit Score: 655.88 E-value: 0e+00
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme yhfX; This subfamily is composed of the ...
1-382
0e+00
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme yhfX; This subfamily is composed of the uncharacterized protein yhfX from Escherichia coli K-12 and similar bacterial proteins. These proteins are homologous to bacterial alanine racemases (AR), which are fold type III PLP-dependent enzymes containing an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. AR exists as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. It catalyzes the interconversion between L- and D-alanine, which is an essential component of the peptidoglycan layer of bacterial cell walls. Members of this subfamily may act as PLP-dependent enzymes.
Pssm-ID: 143486 Cd Length: 382 Bit Score: 655.88 E-value: 0e+00
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme yhfX; This subfamily is composed of the ...
1-382
0e+00
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme yhfX; This subfamily is composed of the uncharacterized protein yhfX from Escherichia coli K-12 and similar bacterial proteins. These proteins are homologous to bacterial alanine racemases (AR), which are fold type III PLP-dependent enzymes containing an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. AR exists as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. It catalyzes the interconversion between L- and D-alanine, which is an essential component of the peptidoglycan layer of bacterial cell walls. Members of this subfamily may act as PLP-dependent enzymes.
Pssm-ID: 143486 Cd Length: 382 Bit Score: 655.88 E-value: 0e+00
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes; The fold type III PLP-dependent enzyme ...
38-257
5.41e-46
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes; The fold type III PLP-dependent enzyme family is predominantly composed of two-domain proteins with similarity to bacterial alanine racemases (AR) including eukaryotic ornithine decarboxylases (ODC), prokaryotic diaminopimelate decarboxylases (DapDC), biosynthetic arginine decarboxylases (ADC), carboxynorspermidine decarboxylases (CANSDC), and similar proteins. AR-like proteins contain an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. They exist as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. These proteins play important roles in the biosynthesis of amino acids and polyamine. The family also includes the single-domain YBL036c-like proteins, which contain a single PLP-binding TIM-barrel domain without any N- or C-terminal extensions. Due to the lack of a second domain, these proteins may possess only limited D- to L-alanine racemase activity or non-specific racemase activity.
Pssm-ID: 143484 [Multi-domain] Cd Length: 211 Bit Score: 156.71 E-value: 5.41e-46
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Alanine Racemase-like 1; This subfamily ...
33-245
1.58e-16
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Alanine Racemase-like 1; This subfamily is composed of uncharacterized bacterial proteins with similarity to bacterial alanine racemases (AR), which are fold type III PLP-dependent enzymes containing an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. AR exists as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. It catalyzes the interconversion between L- and D-alanine, which is an essential component of the peptidoglycan layer of bacterial cell walls. Members of this subfamily may act as PLP-dependent enzymes.
Pssm-ID: 143490 [Multi-domain] Cd Length: 353 Bit Score: 79.90 E-value: 1.58e-16
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Alanine Racemase; This family includes ...
69-195
1.46e-07
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Alanine Racemase; This family includes predominantly bacterial alanine racemases (AR), some serine racemases (SerRac), and putative bifunctional enzymes containing N-terminal UDP-N-acetylmuramoyl-tripeptide:D-alanyl-D-alanine ligase (murF) and C-terminal AR domains. These proteins are fold type III PLP-dependent enzymes that play essential roles in peptidoglycan biosynthesis. AR catalyzes the interconversion between L- and D-alanine, which is an essential component of the peptidoglycan layer of bacterial cell walls. SerRac converts L-serine into its D-enantiomer (D-serine) for peptidoglycan synthesis. murF catalyzes the addition of D-Ala-D-Ala to UDPMurNAc-tripeptide, the final step in the synthesis of the cytoplasmic precursor of bacterial cell wall peptidoglycan. Members of this family contain an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. They exist as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. AR and other members of this family require dimer formation and the presence of the PLP cofactor for catalytic activity. Fungal ARs and eukaryotic serine racemases, which are fold types I and II PLP-dependent enzymes respectively, are excluded from this family.
Pssm-ID: 143481 [Multi-domain] Cd Length: 367 Bit Score: 52.88 E-value: 1.46e-07
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes, Low Specificity D-Threonine ...
32-256
6.27e-04
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes, Low Specificity D-Threonine Aldolase-like; This subfamily is composed of uncharacterized bacterial proteins with similarity to low specificity D-threonine aldolase (D-TA), which is a fold type III PLP-dependent enzyme that catalyzes the interconversion between D-threonine/D-allo-threonine and glycine plus acetaldehyde. Both PLP and divalent cations (eg. Mn2+) are required for catalytic activity. Low specificity D-TAs show similarity to bacterial alanine racemase (AR), which contains an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. AR exists as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. Based on its similarity to AR, it is possible that low specificity D-TAs also form dimers in solution. Experimental data show that the monomeric form of low specificity D-TAs exhibit full catalytic activity.
Pssm-ID: 143494 [Multi-domain] Cd Length: 353 Bit Score: 41.53 E-value: 6.27e-04
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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